双目视觉脉搏图像采集系统精度分析

摘要

An analysis of accuracy of the self-developed binocular vision pulse image acquisition system is made by laser displacement sensor.The synchronous trigger system is constructed to control the synchronization acquisition of binocular camera and laser displacement sensor.Based on the binocular vision measurement principle,the spatial information of the laser spot centroid is obtained,and the pulse waveform is extracted.By designing the Butterworth low-pass filter,the actual pulse waveform is acquired from the laser signal.The amplitude of the waveforms are compared with each other,then the measurement error of the binocular vision pulse image acquisition system is obtained.Accuracy analysis provides reliable data for binocular vision follow-up and analysis.%该文针对自主研制的双目视觉脉搏图像采集系统,利用激光位移传感器对其精度进行分析.构建同步触发系统,控制双目相机与激光位移传感器同步采集.基于双目视觉测量原理,求取激光点质心的空间信息,进而提取脉搏波形.设计巴特沃斯低通滤波器,从激光信号中获取实际的脉搏波形.将两者所得波形的幅值进行对比,得到双目视觉脉搏图像采集系统的测量误差,进行精度分析,为双目视觉后续处理及分析提供了可靠的数据.